[Xen-devel] [PATCH v2] 9pfs has a QEMU backend

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

Add 9pfs to the kind of PV drivers that has a QEMU backend, specifically
to the macro QEMU_BACKEND.

This is needed otherwise upon domain destroy we get a timeout error:

libxl: error: libxl_device.c:1132:device_backend_callback: Domain 1:unable to 
remove device with path /local/domain/0/backend/9pfs/1/0
libxl: error: libxl_domain.c:1129:devices_destroy_cb: Domain 
1:libxl__devices_destroy failed

This change should have been part of b53b4037cef6 "libxl/xl: add support
for Xen 9pfs".

Also add a comment in libxl_types_internal.idl to help remember changing
QEMU_BACKEND going forward.

Signed-off-by: Stefano Stabellini <stefanos@xxxxxxxxxx>

---

Changes in v2:
- add in-code comment
- improve commit message

---

 tools/libxl/libxl_internal.h         | 1 +
 tools/libxl/libxl_types_internal.idl | 1 +
 2 files changed, 2 insertions(+)

diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index a3102871f3..e7d9777930 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -636,6 +636,7 @@ typedef struct {
     (dev)->backend_kind == LIBXL__DEVICE_KIND_QDISK || \
     (dev)->backend_kind == LIBXL__DEVICE_KIND_VFB || \
     (dev)->backend_kind == LIBXL__DEVICE_KIND_QUSB || \
+    (dev)->backend_kind == LIBXL__DEVICE_KIND_9PFS || \
     (dev)->backend_kind == LIBXL__DEVICE_KIND_VKBD)
 
 #define XC_PCI_BDF             "0x%x, 0x%x, 0x%x, 0x%x"
diff --git a/tools/libxl/libxl_types_internal.idl 
b/tools/libxl/libxl_types_internal.idl
index 37402e49cb..cb85c3b37f 100644
--- a/tools/libxl/libxl_types_internal.idl
+++ b/tools/libxl/libxl_types_internal.idl
@@ -13,6 +13,7 @@ libxl__qmp_message_type = Enumeration("qmp_message_type", [
     (5, "invalid"),
     ])
 
+# Consider adding to QEMU_BACKEND in libxl_internal.h
 libxl__device_kind = Enumeration("device_kind", [
     (0, "NONE"),
     (1, "VIF"),
-- 
2.17.1


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